2007年-2016年广州市水源水中氨氮季节变化分析

Seasonal variation of ammonia nitrogen in source water in Guangzhou during 2007-2016

目的通过对2007年-2016年广州市8个市政水厂和1个自建水厂水源水中氨氮的检测结果进行分析,了解氨氮的季节变化及分布情况。方法按照《水质铵的测定纳氏试剂比色法》对每季度水源水监测点的氨氮进行检测,利用Excel和SPSS 21.0对检测数据进行整理分析。结果 2007年-2016年,珠江、东江、北江、流溪河及西江的氨氮平均含量分别为(3.38±0.24)mg/L、(0.68±0.04)mg/L、(0.29±0.02)mg/L、(1.01±0.13)mg/L及(0.27±0.02)mg/L;广州市各水源水丰水期和枯水期的氨氮分布差异均无统计学意义(P>0.05);在丰水期和枯水期,广州市各水源水之间的氨氮含量差异均有统计学意义(P<0.001),且珠江水的氨氮含量最高,西江最低,两者氨氮含量差异均有统计学意义(P<0.001)。结论广州市水源水氨氮的含量不受季节变化影响。西江水源水替代珠江后,氨氮含量明显下降,水质得到改善。

Objective To analyze the detection results of ammonia nitrogen in the water source from eight municipal waterworks and one selfbuilt waterworks in Guangzhou during 2007 -2016, so as to understand its seasonal variation and distribution. Methods Water Quality determination of Ammonium sodium Reagent Colorimetric Method was used to test ammonia nitrogen in the source water, and the results were analyzed by Excell and SPSS 21.0. Results During 2007 2016, the average ammonia nitrogen of the Pearl River, Dongjiang, Beijiang River, Liuxi River and Xijiang was respectively 3.38 mg/L ±0.24 mg/L, 0.68 mg/L ±0.04 mg/L, 0.29 mg/L ±0.02 mg/L, 1.01 mg/L ±0.13 mg/L and 0.27 mg/L ±0.02 rag/L; there was no statistical significance on the distribution difference of ammonia nitrogen in Guangzhou source water between wet season and dry season（P 〉 0.05 ）. However, there was statistical significance on the difference of ammonia nitrogen among differenct the source waters of Guangzhou （P 〈 0.001 ）, and the ammonia nitrogen content of Pearl River was the highest, that of West River was the lowest, with the difference of ammonia nitrogen content statistically significant（P 〈 0. 001 ）. Conclusion The content of ammonia nitrogen was not affected by seasons in the source water of Guangzhou, and the water quality was improved after the West River water source replaced the Pearl River water source.